how to use the montessori alphabet box - Wildflower Ramblings (except larger boxes)
The bolts are graded in diameter for a more difficult exercise. Five slotted bolts and stubby screwdriver. Designed by a Montessori teacher to aid the development of eye-hand coordination and teach a practical skill.
Puzzle fatto in casa - homemade shape puzzle - happy hooligans - cbc kids
Link is in French, but I think the picture is enough. Use a slotted spoon to remove floating objects from water-filled bowl;